Max kelling



(No Mode-1.)

M. KELLING. FIRE PROOF DOOR'.

No. 416.265. Patented Dec. 3, 1889.

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UNITED STATES PATENT OFFICE.

MAX KELLING, on NEw YORK, N. Y.

FIRE-PROOF DOOR.

SPECIFICATION forming part of Letters Patent No. 416,265, dated December 3, 1889. Application tiled April 8, 1889. Serial No. 306,354. (No model.)

To all whom .it may concern:

Be it known that I, MAX KELLING, a citizen of the United States, residing at New York, in the county and State of New York, have invented a new and useful Improvement in Fire-Proof Doors, of which the following is a specification.

This invention is especially applicable to elevator-shafts where there is a possibility in case of iire in a building Of burning away the wooden doors ordinarily used, and thus Opening a draft,which causes the flames to spread to other i'loors of the building. It is obvious that inA an elevator-shaft the iron or {ire-proof door may be closed On the iioor on which the fire originates, cutting 4Off all draft and allowing the elevator to be operated tO remove persons from other floors.

The invention consists in the novel combination of parts and in the construction of the door and its frame, whereby lightness Y and durability are secured.

In the drawings, Figure l is a front elevation of the door. Fig. 2 is a side elevation showing the door and casing secured to a wall by ties. through the line X X, Fig. I. Figs. 4, 5, 6, and 7 illustrate modification in the manner of securing the door-casing in a shaft-opening- Similar letters designate corresponding parts throughout the drawings. y

Referring by letter to the drawings, A designates the door, B the casing, and C shows a portion Of `a wall Of a shaft.

The door A, Of sheet metal, preferably a single thickness of sheet-iron, has panels stamped therein, as shown at a, and the sheet metal is mountel on a wrought-iron frame D by having its edges turned or bent around the framing, as at a', Or it may be secured to the framing in any other well-known manner. The frame D Inay be of angular rods, as shown in Fig. 3, or it may be round iron rods, as shown at Fig. 4.

I prefer the door A to be of sheet metal, as stated, for the reason that in case Of ire the expansion caused by the heat will have a tending to lbulge the light metal and not lock the door in its casing, as would result in the use of a cast-metal or heavy7 iron door. The panels, by increasing the surface of the door, aid materially in its expansion.

Fig. 3 is a transverse section The casing B is formed of a single length of wrought-iron, having its meeting ends secured together in any desired manner. I have shown it joined by means of afish-plate b, securely bolted in place.

The casing B is L-shaped in cross-section, and has its inner faces impinging tightly against the wall and further secured by means Of ties b.

The door A is hung on hinges c, which have their opposite wings riveted or bolted to the door and casing, respectively, and a lock c is also provided.

In Fig. 2 I have shown the ties b as consisting of angle-irons secured at one end to the casing and projected into the wall. In Figs. 4, 6, and 7 I show the tie as comprising an iron molding and screws c', attaching the molding and casing together.

In Figs. 5, 6, and 7 I show the casing A as having an Outward extension d, forming an abutment for the lath and plaster.

I have described the door-casing as fitted in an opening in a wall of masonry. It is to be understood, however, that the walls of the shaft adjacent to the casing may be Of other material-such, for instance, as ir'n posts and beams.

I am aware that iron doors are not broadly new; but thick or cast-iron doors are objectionable for the reason, as before stated, that heat will expand the metal laterally in the casing and prevent its being opened when desired.

Having described my invention, what I claim, and desire to secure by Letters Patent,

In combination with an elevator or other shaft, a Inetal casing secured to said shaftwall, a door consisting of a single thickness of sheet metal having a panel or panels stamped therein, and an iron frame having the edges of the sheet metal bent or turned around it, the saiddoor being hinged within the casing, substantially as specified.

C. R. FERGUSON, WM. H. ROBINSON. 

